The beta test of our new Account Security interface, which includes two-factor authentication, is now starting!

Those who have asked to participate will have their accounts patched to our new production servers where the Account Security screen is available from the Account interface. We will inform each of you when this has been done.

If you would like to participate in the beta test, please contact Runbox Support.

I have not seen any 2FA options to include YUBI key. (I've got one of these too.) I am currently using 2FA via Google authenticator TOTP and it works very well. If you store your "secret key" in a secure place you can not only use your phone but the Google authenticator plugin in your browser. Here are the options and a link to the Account Security Page at RunBox.

Two-Factor Authentication

When Two-Factor Authentication (2FA) is enabled, you will have the following options:

Timed One-Time Passwords (TOTP): To use this option you will need a smartphone and some free software. This option works by giving you a login code which changes over time, in addition to your password.

One-Time Passwords (OTP): When you enable this option, the system will generate random passwords that you can use only once. Used passwords are discarded automatically can not be used again
.
Trust browser: This allows the server to trust your current web browser so that you don't have to use a 2FA code.

Unlock code: If for some reason you are unable to log in with 2FA after it has been enabled, this code can be used to disable 2FA.